Flywheel HP to wheel HP

[cleong]

I would not trust a ScanGauge for accurate horsepower measurements. The most accurate would be a rolling road, ie, chassis dyno.

It is highly unlikely that a K&N drop-in filter will give you 34hp more at the crank. That's gains that you'd need forced induction to achieve.

[andries]

Originally Posted by cleong

I would not trust a ScanGauge for accurate horsepower measurements. The most accurate would be a rolling road, ie, chassis dyno.

It is highly unlikely that a K&N drop-in filter will give you 34hp more at the crank. That's gains that you'd need forced induction to achieve.

I have stock about 133 hp on the wheels. 15% from 167 flywheel hp is 142 wheel HP.
That would mean that the K&N is give me about 9 HP more and not 34 HP you said.
Or will I now accounting wrong?